JPS633963Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a cover opening/closing mechanism, and particularly to providing a cover opening/closing mechanism with an improved locking mechanism for keeping the cover open.

(b) Background of the invention A device having a cover that can be opened and closed on the main body of the device is provided with a mechanism that locks the cover when the cover is opened to a predetermined position.

(c) Prior Art and Problems As this cover locking mechanism, as shown in FIG. 1, it is conceivable to provide a stay 3 on an upper cover 1 which is attached to a lower cover 2 so as to be openable and closable. This stay 3 is rotatably screwed to the inside of the upper cover. The stay 3 has a notch 3a at its free end. This notch 3a is a locking portion 2a provided inside the lower cover 2 when the upper cover 1 is opened to a predetermined position as shown in FIG.
engage with. As a result, the upper cover 1 is kept open.

Here, in order to engage the notch portion 3a of the stay 3 with the locking portion 2a of the main body of the device, a mechanism for urging the stay 3 in the direction shown by arrow A in FIG. 2 is required. As a biasing mechanism for this stay 3, for example, a third
The mechanisms shown in Figures a and b are possible.

That is, as shown in FIG. 3a, locking pins 3c and 5 are formed on the stay 3 and the upper cover, respectively.
A spring 4 is interposed between c and 5. The tensile force of the spring 4 can bias the stay 3 in the direction of the arrow about the fulcrum 3b.

As another method, as shown in FIG. 3b, a pin 3d provided on the stay 3 and the upper cover,
A mechanism in which a torsion coil spring is interposed between 7 and 7 is also conceivable.

However, in the mechanism shown in Fig. 3, the spring,
This has the disadvantage that a complicated structure such as a spring locking pin is required.

(d) Purpose of the invention The purpose of the present invention is to provide a cover opening/closing mechanism that is simple in structure and inexpensive, in order to eliminate the above-mentioned disadvantages.

(e) Structure of the invention In order to achieve the above object, the cover opening/closing mechanism of the invention includes a stay that is rotatably supported by a cover that is attached to the main body of the device so as to be openable and closable, and a stay that rotates when the cover is opened. and a biasing means for biasing the stay in a direction opposite to the rotational direction when the cover is opened to a predetermined position. A cover opening/closing mechanism that maintains the open state of the cover by engaging an engaging portion and a locking portion provided on the device main body side, the stay being formed of an elastic member and , the biasing means is a claw portion provided to protrude from the stay in the rotating direction of the stay at a position near the pivot support, and the claw portion is configured to engage the inner surface of the cover during the opening operation of the cover. The locking portion and the engaging portion are configured to come into contact with each other and receive rotational force around the shaft portion of the stay to bias the stay in a certain direction so as to engage the locking portion and the engaging portion. That is.

The present invention will be explained in detail below using the drawings.

(f) Embodiment of the invention FIG. 4 is a diagram showing an embodiment of the invention, and FIG. 5 is a diagram showing the operation of the stay 8 shown in FIG. 4.

In the figure, 1 is an upper cover, 2 is a lower cover, 8 is a stay, 9 is a stopper, 10 is a screw, and 11 is a mounting shaft.

As shown in FIG. 4b, the stay 8 has a notch 8
It consists of a stay main body in which a is formed and a claw portion 8b, and both are arranged at a substantially right angle with the mounting shaft 11 as an intersection point. As is clear from the front view of FIG. 4a, the mounting shaft 11 is provided to protrude from the inner surface of the upper cover 1. The stay 8 is rotatably supported by a mounting shaft 11. A stopper 9 is inserted into the end of the mounting shaft 11 to prevent the stay 8 from coming off the mounting shaft 11.

The operation of the cover opening/closing mechanism of this embodiment will be described below with reference to FIG.

The upper cover 1 is rotatably attached to the lower cover 2 by screws 10. When the upper cover 1 is opened, that is, rotated clockwise in FIG. 4b, the claw portion 8b of the stay 8 first comes into contact with the inner surface of the upper cover.

When the upper cover 1 is further opened in this state, the lower side portion of the stay 8 comes into contact with the notch 2a as shown in FIG. 5a. That is, due to the contact with the notch 2a, a counterclockwise force is applied to the stay 8 around the mounting shaft 11. However, due to the contact between the inner surface of the upper cover and the claw portion 8b of the stay 8, the stay 8 is urged in the direction of arrow B in the figure. As the upper cover is further opened, as shown in Fig. 5b,
The cutout portion 8a of the stay 8 automatically engages with the locking portion 2a of the lower cover 2.

As shown in FIG. 5b, the notch 8a of the stay 8
When engaged with the locking portion 2a, the upper cover 1 is locked by the biasing force in the direction of arrow B and the weight of the upper cover 1.

When closing the top cover, press arrow B on stay 8.
By applying force in the opposite direction and disengaging the notch 8a of the stay 8 and the locking part 2a,
Can be easily closed.

In this embodiment, the stay 8 is a molded product, and the stay 8 is biased more reliably due to the elasticity of the molded product.

(g) Effects of the invention As detailed above, according to the invention, automatic locking is possible by simply using a stay that has a claw that comes into contact with the top cover before the top cover is opened to the lock position, and is inexpensive. A simple cover opening/closing mechanism can be provided.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams explaining a cover opening/closing mechanism using a locking mechanism using a stay, Figure 3 is a diagram showing a possible structure as a mechanism for biasing the stay, and Figure 4 is a diagram showing one example of the present invention. FIG. 5 is a diagram showing a cover opening/closing mechanism as an embodiment, and FIG. 5 is a diagram explaining the mechanism operation of the embodiment shown in FIG. 1 is an upper cover, 2 is a lower cover, 3 and 8 are stays, 3a and 8a are cutout portions, and 8b is a claw portion.

Claims (1)

[Scope of utility model registration request] A stay is rotatably supported by a cover that is attached to the main body of the device so that it can be opened and closed; and a biasing means for biasing, when the cover is opened to a predetermined position, an engaging portion provided on the stay and a locking portion provided on the device main body are engaged. The cover opening/closing mechanism is configured to hold the cover in an open state by using the stay, and the stay is formed of an elastic member, and the biasing means rotates the stay from the stay at a position near the pivot support. a claw portion provided to protrude in the moving direction, and the claw portion comes into contact with the inner surface of the cover during the opening operation of the cover,
A cover opening/closing mechanism characterized in that the stay is biased in a certain direction by receiving rotational force around the shaft portion of the stay so that the locking portion and the engaging portion are engaged with each other. .